Zhang Wenyuan
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Zhang Wenyuan (张文远), not to be confused with Zhang Liao of the Three Kingdoms period, is a minor character in the Water Margin.
Zhang was an adulterer in the novel, who had an affair with Song Jiang's wife Yan Poxi. Yan was in love with Zhang and she discovered Song's relations with the bandits from Liangshan. She threatened to report Song to the county office unless Song agreed to her terms, which angered Song and he killed her in a fit of anger.